Maybe this is intended, but in my library, the description for the "Bulletin for Biblical Research", volumes 1-18, reads:
Theological journals are a tremendous resource for biblical studies.... The Theological Journal Library combines several of the best conservative, scholarly, evangelical journals and classic works on church history. This massive set allows you to rapidly search through each title for specific words, phrases, topics, authors, or passages.
Volumes 19-23, however, looks a little more on target and follows the description on the product page. Is this a mistake or is this intended?